September climate

September was colder than normal in John Day. Below-normal temperatures are also expected in October.

Temperatures in John Day averaged colder than normal during the month of September, according to preliminary data received by NOAA's National Weather Service in Pendleton.

The average temperature was 57.4 degrees, which was 2.4 degrees below normal. High temperatures averaged 71.7 degrees, which was 7.1 degrees below normal. The highest was 90 degrees on Sept. 1. Low temperatures averaged 43.1 degrees, which was 2.4 degrees above normal. The lowest was 32 degrees, on Sept. 30.

Precipitation totaled 1.96 inches during September, which was 1.33 inches above normal. Measurable precipitation was received on 10 days with the heaviest, 0.72 inches, reported on Sept. 18.

Precipitation this year has reached 9.71 inches, which is 0.12 inches above normal. Since October, the water year precipitation at John Day has been 12.78 inches, which is 0.39 inches below normal.

The outlook for October from NOAA's Climate Prediction Center calls for below-normal temperatures and near- to above-normal precipitation. Normal highs for John Day fall from 73 degrees at the start of October to 57 degrees at the end of October. Normal lows fall from 36 degrees to 31 degrees. The 30-year normal precipitation is 0.99 inches.

This was the fourth wettest September on record. The wettest was 3.25 inches in 1959.

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